Ok, a question for you mechanical types. I've got a Craftsman belt/disk combo, 2" slack belt and 6" disk with a 1 h.p. motor. I rarely (meaning pretty much never) use the disk sander, it's just too small. I'd love to have one of those inflatable drum sanders for shaping, but can't afford a new toy, I mean tool. How difficult would it be to take the disk off this sander and install a drum on the spindle?